<!--Crit+/-->
<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Hello World</title>
</head>
<script type="text/javascript">
    function btnOnclick() {
        alert("随便点点");
    }

    function textOnfocus() {
        alert("sdfsdf");
    }

    function imgOnmouseover() {
        alert("sdfsd");
    }
</script>
<body><input type="button" value="123" ondblclick="btnOnclick()">
<input type="text" name="" placeholder="dsadasd " id="" onfocusout="textOnfocus()">
<img src="" alt="sd" onmouseover="imgOnmouseover()">
</body>
</body>
</html>